Documentation
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Overview ¶
Package replaybuffer builds a ReplayBuffer from config — the in-process memory buffer (single pod; the default) or Redis (cross-pod) — and runs it through the client tier (Decorate). Callers depend on core/interfaces.ReplayBuffer, so swapping one backend for the other is a config change, never a logic edit. The concrete backends live in the memory/ and redis/ subpackages.
Index ¶
Constants ¶
const ( // KindMemory keeps each key's tail in process: correct for a single pod (the // default). KindMemory client.Kind = "memory" // KindRedis keeps each key's tail in Redis, shared across pods. KindRedis client.Kind = "redis" )
Variables ¶
This section is empty.
Functions ¶
func Decorate ¶ added in v0.0.7
func Decorate( base interfaces.ReplayBuffer, decs decorate.Decorations, name string, opts ...client.Option, ) (interfaces.ReplayBuffer, error)
Decorate runs every operation of base through the client tier as the client named name, one operation per method of its contract.
func NewFromConfig ¶
func NewFromConfig( ctx context.Context, cfg Config, deps Deps, ) (interfaces.ReplayBuffer, error)
NewFromConfig builds the replay buffer cfg.Kind selects and runs it through the client tier. A non-positive MaxSize or TTL, an unknown kind, or KindRedis without Deps.Redis is CodeInvalidInput.
Types ¶
type Config ¶
type Config struct {
// Kind selects the backend; empty means KindMemory.
Kind client.Kind `yaml:"kind" mapstructure:"kind"`
// KeyPrefix namespaces the redis backend's keys (empty uses
// redis.DefaultKeyPrefix, "replay:"); ignored for KindMemory.
KeyPrefix string `yaml:"key_prefix" mapstructure:"key_prefix"`
// Name labels the client in decoration overrides, metrics, spans and logs; empty
// uses the family name ("replaybuffer").
Name string `yaml:"name" mapstructure:"name"`
// MaxSize bounds the retained messages per key.
MaxSize int `yaml:"max_size" mapstructure:"max_size"`
// TTL is how long a key's buffer lives after its last Append.
TTL time.Duration `yaml:"ttl" mapstructure:"ttl"`
}
Config selects and tunes the replay buffer.
type Deps ¶ added in v0.0.7
type Deps struct {
// Decorations decorates the client from the decoration config (decoration.clients)
// and supplies its observability.
decorate.Decorations
// Redis is the shared go-redis client KindRedis requires.
Redis *goredis.Client
}
Deps carries the replay buffer's runtime collaborators.
Source Files
Directories
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| Path | Synopsis |
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Package memory provides an in-process ReplayBuffer backend for single-pod deployments (dev / replica=1), where a reconnect lands on the same pod so cross-pod sharing is unnecessary.
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Package memory provides an in-process ReplayBuffer backend for single-pod deployments (dev / replica=1), where a reconnect lands on the same pod so cross-pod sharing is unnecessary. |
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Package redis provides a cross-pod ReplayBuffer backend over Redis, for multi-replica deployments (staging/prod) where a reconnect may land on a different pod than the one that buffered the tail.
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Package redis provides a cross-pod ReplayBuffer backend over Redis, for multi-replica deployments (staging/prod) where a reconnect may land on a different pod than the one that buffered the tail. |